/usr/share/dbus-1/services/unity-2d-places.service is in unity-2d-shell 5.10.0-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | [D-BUS Service]
Name=com.canonical.Unity2d.Dash
Exec=/usr/bin/unity-2d-shell
|